IEEE Electrification Magazine - June 2017 - 40

Figure 5. Rooftop PV arrays.

Figure 6. Schneider power converters.

Table 1. Implementation details for the Keating nanogrid.
Nanogrid Components

Design Implementation

PV module

Trina Solar's Allmax-PD05.08

Battery module

Aquion Energy's Aqueous Hybrid Ion 48S-2.2

dc-dc converter

Schneider Electric's Xantrex XW MPPT 80 600

dc-ac inverter

Solectria Renewables's PVI 14TL

forming, environmentally sustainable, and cost-effective.
The building block of AHI batteries is the Aspen 48S-2.2 battery,
whose technical characteristics are
shown in Table 2. Figure 8 illustrates the open-circuit voltage and
power-output profile of an Aspen
48S-2.2 battery, which vary with
the state of charge (SOC). Notably,
the Aspen 48S-2.2 battery is optimized for daily deep cycling, which
maximizes the performance and
longevity of AHI batteries. These
batteries can maintain a low SOC
without a significant performance
loss. Equalization charge, namely,
periodically charging to achieve a
100% SOC, is also not required to
maintain the battery life. Accordingly, AHI batteries are the ideal
option for energy storage in the
Keating Nanogrid. Figure 9 shows
the module and the commissioning of Aquion Energy's AHI battery in the Keating Nanogrid,
where the M-Line battery module
is a palletized module that connects 12 S-Line battery stacks (i.e.,
the smallest unit of AHI batteries)
in parallel.

Controllable LED Lighting at the
Keating Nanogrid

The 189 original ac-based fluorescent light fixtures at Keating Hall
were replaced by 94 more efficient
Bidirectional ac-dc converter
Schneider Electric's Conext XW+ 6848 NA
and dimmable dc-based LED li ghts. However, the original highbay LED fixtures were equipped
with an ac outlet. To utilize the
power supplied by the dc subsystem, dc-dc buck-boost converters
were designed at IIT and added to
the LED light fixtures to boost the
nominal dc voltage from 48 to 130
Vdc. The new LED lighting system
has daylight dimming and preFigure 7. The battery storage and power electronics control room.
programmed lighting scenarios
that are appropriate for sporting
conditions. In particular, it is impossible for any internal
activities. Figure 10 shows the LED fixture and dc-dc
reactions to drive the battery above 100 °C, when all the
modules with a wireless ZigBee system for intelligent
contained water will evaporate to cause an open-circuit
remote-control strategies. Figure 11 compares the lightcondition, thereby moderating the maximum battery
ing conditions before and after the installation of the
temperature. These maintenance-free batteries utilized at
LED fixtures at the Keating Nanogrid. Compared with
the Keating Nanogrid have proven to be safe, high perthe conventional fluorescent lights, the LED lights are

40

I E E E E l e c t r i f i c ati o n M agaz ine / j un e 2017



Table of Contents for the Digital Edition of IEEE Electrification Magazine - June 2017

IEEE Electrification Magazine - June 2017 - Cover1
IEEE Electrification Magazine - June 2017 - Cover2
IEEE Electrification Magazine - June 2017 - 1
IEEE Electrification Magazine - June 2017 - 2
IEEE Electrification Magazine - June 2017 - 3
IEEE Electrification Magazine - June 2017 - 4
IEEE Electrification Magazine - June 2017 - 5
IEEE Electrification Magazine - June 2017 - 6
IEEE Electrification Magazine - June 2017 - 7
IEEE Electrification Magazine - June 2017 - 8
IEEE Electrification Magazine - June 2017 - 9
IEEE Electrification Magazine - June 2017 - 10
IEEE Electrification Magazine - June 2017 - 11
IEEE Electrification Magazine - June 2017 - 12
IEEE Electrification Magazine - June 2017 - 13
IEEE Electrification Magazine - June 2017 - 14
IEEE Electrification Magazine - June 2017 - 15
IEEE Electrification Magazine - June 2017 - 16
IEEE Electrification Magazine - June 2017 - 17
IEEE Electrification Magazine - June 2017 - 18
IEEE Electrification Magazine - June 2017 - 19
IEEE Electrification Magazine - June 2017 - 20
IEEE Electrification Magazine - June 2017 - 21
IEEE Electrification Magazine - June 2017 - 22
IEEE Electrification Magazine - June 2017 - 23
IEEE Electrification Magazine - June 2017 - 24
IEEE Electrification Magazine - June 2017 - 25
IEEE Electrification Magazine - June 2017 - 26
IEEE Electrification Magazine - June 2017 - 27
IEEE Electrification Magazine - June 2017 - 28
IEEE Electrification Magazine - June 2017 - 29
IEEE Electrification Magazine - June 2017 - 30
IEEE Electrification Magazine - June 2017 - 31
IEEE Electrification Magazine - June 2017 - 32
IEEE Electrification Magazine - June 2017 - 33
IEEE Electrification Magazine - June 2017 - 34
IEEE Electrification Magazine - June 2017 - 35
IEEE Electrification Magazine - June 2017 - 36
IEEE Electrification Magazine - June 2017 - 37
IEEE Electrification Magazine - June 2017 - 38
IEEE Electrification Magazine - June 2017 - 39
IEEE Electrification Magazine - June 2017 - 40
IEEE Electrification Magazine - June 2017 - 41
IEEE Electrification Magazine - June 2017 - 42
IEEE Electrification Magazine - June 2017 - 43
IEEE Electrification Magazine - June 2017 - 44
IEEE Electrification Magazine - June 2017 - 45
IEEE Electrification Magazine - June 2017 - 46
IEEE Electrification Magazine - June 2017 - 47
IEEE Electrification Magazine - June 2017 - 48
IEEE Electrification Magazine - June 2017 - 49
IEEE Electrification Magazine - June 2017 - 50
IEEE Electrification Magazine - June 2017 - 51
IEEE Electrification Magazine - June 2017 - 52
IEEE Electrification Magazine - June 2017 - 53
IEEE Electrification Magazine - June 2017 - 54
IEEE Electrification Magazine - June 2017 - 55
IEEE Electrification Magazine - June 2017 - 56
IEEE Electrification Magazine - June 2017 - 57
IEEE Electrification Magazine - June 2017 - 58
IEEE Electrification Magazine - June 2017 - 59
IEEE Electrification Magazine - June 2017 - 60
IEEE Electrification Magazine - June 2017 - 61
IEEE Electrification Magazine - June 2017 - 62
IEEE Electrification Magazine - June 2017 - 63
IEEE Electrification Magazine - June 2017 - 64
IEEE Electrification Magazine - June 2017 - 65
IEEE Electrification Magazine - June 2017 - 66
IEEE Electrification Magazine - June 2017 - 67
IEEE Electrification Magazine - June 2017 - 68
IEEE Electrification Magazine - June 2017 - 69
IEEE Electrification Magazine - June 2017 - 70
IEEE Electrification Magazine - June 2017 - 71
IEEE Electrification Magazine - June 2017 - 72
IEEE Electrification Magazine - June 2017 - 73
IEEE Electrification Magazine - June 2017 - 74
IEEE Electrification Magazine - June 2017 - 75
IEEE Electrification Magazine - June 2017 - 76
IEEE Electrification Magazine - June 2017 - 77
IEEE Electrification Magazine - June 2017 - 78
IEEE Electrification Magazine - June 2017 - 79
IEEE Electrification Magazine - June 2017 - 80
IEEE Electrification Magazine - June 2017 - 81
IEEE Electrification Magazine - June 2017 - 82
IEEE Electrification Magazine - June 2017 - 83
IEEE Electrification Magazine - June 2017 - 84
IEEE Electrification Magazine - June 2017 - 85
IEEE Electrification Magazine - June 2017 - 86
IEEE Electrification Magazine - June 2017 - 87
IEEE Electrification Magazine - June 2017 - 88
IEEE Electrification Magazine - June 2017 - Cover3
IEEE Electrification Magazine - June 2017 - Cover4
https://www.nxtbook.com/nxtbooks/pes/electrification_december2022
https://www.nxtbook.com/nxtbooks/pes/electrification_september2022
https://www.nxtbook.com/nxtbooks/pes/electrification_june2022
https://www.nxtbook.com/nxtbooks/pes/electrification_march2022
https://www.nxtbook.com/nxtbooks/pes/electrification_december2021
https://www.nxtbook.com/nxtbooks/pes/electrification_september2021
https://www.nxtbook.com/nxtbooks/pes/electrification_june2021
https://www.nxtbook.com/nxtbooks/pes/electrification_march2021
https://www.nxtbook.com/nxtbooks/pes/electrification_december2020
https://www.nxtbook.com/nxtbooks/pes/electrification_september2020
https://www.nxtbook.com/nxtbooks/pes/electrification_june2020
https://www.nxtbook.com/nxtbooks/pes/electrification_march2020
https://www.nxtbook.com/nxtbooks/pes/electrification_december2019
https://www.nxtbook.com/nxtbooks/pes/electrification_september2019
https://www.nxtbook.com/nxtbooks/pes/electrification_june2019
https://www.nxtbook.com/nxtbooks/pes/electrification_march2019
https://www.nxtbook.com/nxtbooks/pes/electrification_december2018
https://www.nxtbook.com/nxtbooks/pes/electrification_september2018
https://www.nxtbook.com/nxtbooks/pes/electrification_june2018
https://www.nxtbook.com/nxtbooks/pes/electrification_december2017
https://www.nxtbook.com/nxtbooks/pes/electrification_september2017
https://www.nxtbook.com/nxtbooks/pes/electrification_march2018
https://www.nxtbook.com/nxtbooks/pes/electrification_june2017
https://www.nxtbook.com/nxtbooks/pes/electrification_march2017
https://www.nxtbook.com/nxtbooks/pes/electrification_june2016
https://www.nxtbook.com/nxtbooks/pes/electrification_december2016
https://www.nxtbook.com/nxtbooks/pes/electrification_september2016
https://www.nxtbook.com/nxtbooks/pes/electrification_december2015
https://www.nxtbook.com/nxtbooks/pes/electrification_march2016
https://www.nxtbook.com/nxtbooks/pes/electrification_march2015
https://www.nxtbook.com/nxtbooks/pes/electrification_june2015
https://www.nxtbook.com/nxtbooks/pes/electrification_september2015
https://www.nxtbook.com/nxtbooks/pes/electrification_march2014
https://www.nxtbook.com/nxtbooks/pes/electrification_june2014
https://www.nxtbook.com/nxtbooks/pes/electrification_september2014
https://www.nxtbook.com/nxtbooks/pes/electrification_december2014
https://www.nxtbook.com/nxtbooks/pes/electrification_december2013
https://www.nxtbook.com/nxtbooks/pes/electrification_september2013
https://www.nxtbookmedia.com